New in Symfony 4.3: Improved performance of PropertyAccess

The PropertyAccess component allows to read/write properties from objects and
arrays using a simple string notation. It's used by Symfony components like
Forms, Security, Validator, Workflow and hundreds of other public projects.

In Symfony 4.3 we improved its performance refactoring the code of the
ObjectNormalizer class. The trick was to add some shortcuts for cases where
we know that we do not need to perform all checks.

Saving so many function calls in such a critical operation results in a
20% to 30% performance improvement for a non-trivial synthetic benchmark.
You can expect even better improvements if your app deals with large objects
and complex property paths.

Best of all? You don't need to make any change in your application code to
benefit from this improvement. Upgrade to Symfony 4.3 when it's released at
the end of May 2019 and that's all.